Experimental music is supposed to try and expand the boundaries of the possible. It’s always something of a gamble, but a thrilling one at that. Actress, AKA London-based experimental techno artist Darren Cunningham, has thus far managed to carve a niche for himself in an area that’s generally quite difficult to stand out in. Spend enough time among his soundscapes and you can begin to easily identify an Actress track – there’s a distinctiveness to his work that Cunningham has characterised as “almost like extreme patenting”. AZD (pronounced “azid”) is his fifth album under this moniker, one that arrived with…